cdf
Location: lib, 4 Lines
; Scheme 9 from Empty Space, Function Library ; By Nils M Holm, 2015 ; Placed in the Public Domain ; ; (cdf real) ==> real ; ; (load-from-library "cdf.scm") ; ; Compute the quantile of the given standard deviation (cumulative ; distribution function). Results will get flaky beyond 5th standard ; deviation; see ERF for details. ; ; Example: (cdf 0) ==> 0.5 (load-from-library "erf.scm") (define (cdf x) (+ 0.5 (* 0.5 (erf (/ x (sqrt 2))))))